<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <!-- 搜索与输入框 -->
            <el-row :gutter="20">
                <el-col :span="9">
                     <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList()">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
                </el-col>
            </el-row>
            <!-- 用户列表区域 -->
            <el-table :data="userlist" border stripe>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态" prop="mg_state">
                    <template slot-scope="scope">
                        <!-- 作用域插槽scope.row拿到当前这行的所有数据 -->
                        <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="180px">
                    <template slot-scope="scope">
                        <el-tooltip effect="dark" content="修改" placement="top" :enterable="false">
                            <!-- 修改按钮 -->
                            <el-button type="primary" icon="el-icon-edit" size="mini"  @click="showEditDialog(scope.row)"></el-button>
                        </el-tooltip>
                        <el-tooltip effect="dark" content="删除" placement="top" :enterable="false">
                            <!-- 删除按钮 -->
                            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                        </el-tooltip>
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <!-- 分配角色按钮 -->
                            <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[ 2, 5, 10]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
            </el-pagination>
        </el-card>

        <!-- 添加用户的弹窗 -->
        <el-dialog
            title="添加用户"
            :visible.sync="addDialogVisible"
            width="50%" @close="dialogClosed">
            <!-- 弹窗内容的主体 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户的弹窗 -->
        <el-dialog
          title="修改用户"
          :visible.sync="editDialogVisible"
          width="50%" @close="editDialogClosed">
          <!-- 表单内容区 -->
          <el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary"  @click="editUserInfo">确 定</el-button>
          </span>
        </el-dialog>

        <!-- 分配角色的对话框 -->
        <el-dialog
          title="分配角色"
          :visible.sync="setRoleDialogVisible"
          width="50%">
          <div>
            <p>当前的用户：{{userinfo.username}}</p>
            <p>当前的角色：{{userinfo.role_name}}</p>
            <p>分配新角色：
              <el-select v-model="selectedRoleId" placeholder="请选择">
                <el-option
                  v-for="item in rolelist"
                  :key="item.id"
                  :label="item.roleName"
                  :value="item.id">
                </el-option>
              </el-select>
            </p>
          </div>
          <span slot="footer" class="dialog-footer">
            <el-button @click="setRoleDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="savaRoleInfo">确 定</el-button>
          </span>
        </el-dialog>

    </div>
</template>

<script>
export default {
  data () {
    // 验证邮箱
    var checkEmail = (rule, value, cb) => {
      // 验证邮箱的正则表达式
      const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/

      if (regEmail.test(value)) {
        // 合法的邮箱
        return cb()
      }

      cb(new Error('请输入合法的邮箱'))
    }
    // 验证手机号
    var checkMobile = (rule, value, cb) => {
      // 验证手机号的正则表达式
      const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

      if (regMobile.test(value)) {
        return cb()
      }

      cb(new Error('请输入合法的手机号'))
    }
    return {
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 2
      },
      userlist: [],
      total: 0,
      //   添加用户对话框的显示与隐藏
      addDialogVisible: false,
      //   添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      //   表单的验证规则
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '用户名的长度在3~10字符之间', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '密码的长度在6~15字符之间', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userinfo: {},
      // 当前所有的角色列表
      rolelist: [],
      // 已选中的角色id值
      selectedRoleId: ''
    }
  },
  created () {
    this.getUserList()
  },
  methods: {
    async getUserList () {
      const { data: res } = await this.$http.get('users', { params: this.queryInfo })
      if (res.meta.status !== 200) return this.$message.error('获取用户列表失败！')
      else this.userlist = res.data.users
      this.total = res.data.total
    },
    // 监听pagesize改变的事件
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听页码值改变的事件
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听switch开关状态的变化
    async userStateChanged (userinfo) {
      const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if (res.meta.status !== 200) {
        //   因为后台更新状态失败，但前台检测到的mf_state已经改变，所以需要修改
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('更新用户状态失败！')
      } else this.$message.success('更新用户状态成功！')
    },
    // 监听关闭对话框的关闭事件
    dialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮对表单数据预校验，添加用户
    addUser () {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        // 可以发起请求
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        } else {
          this.$message.success('添加用户成功！')
          // 隐藏添加用户的对话框
          this.addDialogVisible = false
          // 重新获取用户数据
          this.getUserList()
        }
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (data) {
      // console.log(data)
      const { data: res } = await this.$http.get('users/' + data.id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询信息失败！')
      } else this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户的校验
    editUserInfo () {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        // 发起修改用户的数据请求
        const { data: res } = await this.$http.put('users/' + this.editForm.id, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改用户信息失败！')
        } else this.$message.success('修改用户信息成功！')
        this.editDialogVisible = false
        this.getUserList()
      })
    },
    // 根据id删除用户的信息
    async removeUserById (id) {
      // 弹框询问是否确认删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

      // 如果用户确认删除返回字符串confirm
      // 如果用户取消删除返回字符串cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除操作！')
      }
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.err('删除用户失败！')
      }
      this.$message.success('删除用户成功！')
      this.getUserList()
    },
    // 展示分配角色的对话框
    async setRole (userinfo) {
      this.userinfo = userinfo
      // 在展示对话框以前，获取所有角色的列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data

      this.setRoleDialogVisible = true
    },
    // 点击按钮分配角色
    async savaRoleInfo () {
      if (!this.selectedRoleId) {
        return this.$message.error('当前未选择分配角色！')
      }
      const { data: res } = await this.$http.put(`users/${this.userinfo.id}/role`, {
        rid: this.selectedRoleId
      })
      if (res.meta.status !== 200) {
        return this.$message.error('为用户分配角色失败！')
      }
      this.getUserList()
      this.selectedRoleId = ''
      this.userinfo = {}
      this.$message.success('分配角色成功！')
      this.setRoleDialogVisible = false
    }
  }

}
</script>

<style lang="less" scoped>

</style>
